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Monitoring of Biodegradation of Oxalate in Microfluidic Bioelectrochemical Systems

Yousefi, Reyhaneh | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52935 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Bastani, Daryoush; Yaghmaei, Soheila; Mardanpour, Mohammad Mehdi
  7. Abstract:
  8. In present study, bioelectrochemical degradation of oxalate as a substance which its concentration in kidney leads to urolithiasis in a microfluidic microbial fuel cell (MFC) was investigated. In addition, to define a novel application for the microfluidic MFC, measurement and monitoring of oxalate concentration were studied. This application can introduce the system as an implantable medical device for medical usage of urolithiasis and hyperoxaluria diseases. In this work, by designing and fabrication of two MFCs including a large-scale and microfluidic one, and measuring the outlet concentration of oxalate in the large-scale system, the outlet concentration of oxalate at microfluidic MFC was predicted. The anodic chamber volume of large-scale and microfluidic MFCs were 18.34 ml and 85 µl, respectively. The main elements of both systems include spiral microchannel as the anodic chamber, carbon cloth cathode, nickel anode, proton exchange membrane and anerobic sludge as biocatalysts. Based on the allowable oxalate concentration in kidney (about 156 mg l-1), the maximum produced current and power densities of 19.44 A m-3 and 8.17 W m-3 for the large-scale system and 96.01 A m-3 and 44.16 W m-3 for the microfluidic MFC were obtained. In the large-scale system, the oxalate removal and coulombic efficiency were 99.04 and 44.2%. The electrochemical characteristics of both systems were analyzed using the polarization curves and by analogy assistance of their electrochemical responses, the correlations to predict oxalate concentration at the outlet of microfluidic MFC was acquired
  9. Keywords:
  10. Biosensor ; Microbial Fuel Cell ; Microfluidic System ; Oxalate ; Implantable System ; Biodegradation ; Bioelectrochemical Systems ; Spiral Geometry

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